| Creep-fatigue design studies for a sodium-cooled fast reactor with tube sheet-toshell structure subjected to elevated temperature service
Gyeong-Hoi Koo/Jae-Han Lee
The Journal of Mechanical Science and Technology, vol. 24, no. 3, pp.711-719, 2010
Abstract : In this paper, creep-fatigue damage under elevated temperatures is investigated for a tube sheet-to-shell structure, which is one of the
main structures under Gen-IV class 1 components. To do this, detailed step-by-step procedures, including the elastic structural analysis
and the ASME-NH code application, are described for a defined representative load cycle. From the sensitivity studies for various design
parameters, such as hold time duration, shell thickness, and operating temperature, it is found that a reduction of thickness can decrease
the thermal bending stresses, but the negative effect is that it may increase the primary stress and enhance the creep damage. The normal
operating temperature is the most significant parameter in the creep-fatigue design.
Keyword : Creep-fatigue; Sodium-cooled fast reactor; ASME-NH; Elevated temperature design; Creep damage; Gen-IV |
